Door lifter



July 22, 193i). s. J. JAcQBsMr-:IER .1,771,121

DOOR LIFTER Filed llarch 26, 1929 Q s i i ,a 5 s I 5 i g I I l i l a z-Z g I l I l s I I l z l z l l I I s l 5/ l" l n" HN IU" "r'///`//////////////l I 6r i. 6@ -SQ (jv/ Z Y Jmwntoc 7. Sc/.Fc/aoomez'er a; The primary object of this invention is to' Patented July 22, 1930 STEPHEN maAcoBsMEIEii, Lor SALEM; rowni Doon LIFTB; A

Application fued March '26, 1929.- seriai No. 350,062.,`

This invention relates to an improved means for hanging sliding doors, particularly doors of large size like barn or garage doors.

prrovide a structure for supporting a door` om a carrying track whereby the door may be raised or lowered upon the track when the same is desirable to facilitate the shifting thereof.

It frequently occurs that vdoors of large size sag due to a weakening of the supporting track or the structure `upon which `the track is mounted, as a result of which the door comes into contact with the ground or surface lying therebeneath7 making it diiiicult to open and shut the door. This con dition also frequently `results from the settling of the building or it may be that ,-1 diliiculty will be experienced in openingthe door in winter weather when snow or ice hasv to free the lower edge thereof from any ob- A struction and to enable the operator to more readily slide the door to open or closed position.

Another object of the present invention is to provide a structure by means of which the foregoing may be effected, which will be of simple design, but strongv and durable,V and easy to install. Y Y i The invention will be best understood from a consideration of the following detailed description takenv in connection with the accompanying drawing forming apart of thisl specification, with the understanding, however, that the invention is not confined to any strict conformity with the showing of the drawing butmay be changed or modified so long as such changes or modiiications mark no material departure from the salient The object of the present invention therefore is to provide a means whereby the door can first beV convenientlyshifted verticallyv features; of the invention as expressed Ain the appended Claims.

InJfthei-jrawingefi FigllITP/l` isgal view inelevation of the doom-structure,*mounted in accordance with thel present invention.;

ortica i f Figure 2 isa sectional view taken uponthe line 2v2 of Figure l.` 1

Referringto the `drawing in detaihthe numerall indicatesy a portion of abuilding,V such for example as a barnor garage-having a door opening 2 overwhich, is` positioned A.a

door 3.

Secured to the' faceQf the i, buildingabove v the. door opening in theusual manner is a; track rail upon whichis, mounted/a pluralityI of rollers each of, whichis enclosedin a cas-v. ing whichhasa top 6a vand inner and outer sidesgb and o? respectively. The outer side A,

coflthecasing.: extendsV to a point adjacent theflower side of the track 4 as shown in FigureQ for the, purposehereinafter described, As shown, only thevlower edge of the casing 6 is open so as to permit Contact of i the. wheelstherein withV the` track rail 4.

lnlthe; present invention. the outerv wall 69 of each casing has secured thereto and extending A outwardly and downwardly there` frointhebrace bar 7, the lower,` end of which overlies and bears against theouter faceV of thei door inthe manner showniinFigure 2.

As 4shownin Figure 2, theiportion of the A bracebar libetween the upper end whereit is i f secured toithewall Gof; theroller casing and the `lower endwhich engages the door 3 is offsetwith respecttotheA outer wall of the roller casing andthe outerface ofthe door'and pivotally .mounted adjacent the innerV face of this oil-setplortion," upon the pin 8 extending l therethrough: l is ai lever 8a, the mounting point forV the leven beingy intermediate its.

ends Aand atl one iside of' the.transverse center y thereof5:a'si"shjewit.` f' Y t The inner end of thepinS engages inandis.

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Supported by the lower portion of the wall 6L of the roller casing.

To the outer end of each lever 8a is pivotally attached the upper end portion of a hanger plate 9, the lower edge of which is secured to The lever 12 carries a pawl 14:, which en' gages the segment 13, and this pawl is controlled through the medium of a rod l15 con` nected with a latch 16, pivotally mounted upon the lever adjacent the free end.'

From the foregoing description it will be readily seen that vertical shifting of the door 3 is effected by grasping the :tree end of the main control lever 12, releasing the pawl 14 and pulling down upon the lever, which operation lowers the inner ends of the roller attached levers 8a, fulcruming each at the point where it is attached to the roller '.7 plate and lifting the outer ends and consequently the door. The door can then be readily shifted laterally in the direction desired.

From the foregoing it will be readily seen that with the present device, a door structure #may be easily raised or lowered for the perfa track secured above the door, encased roller members supported upon said track, hanger plates secured to and extending above theV top edge of the door, lever members each pivotally secured inwardly of one end of a roller easing and having the adjacent end pivotally attached to one of said hanger members, and guide bars carried by and suspended from the roller casings, each overlying a face of the door.

2. The combination with a sliding door, of a track secured above the door, encased roller members supported upon said track, hanger plates secured to and extending above the top edge of the door, lever members each pivotally secured inwardly of one end to a roller casing and having the adjacent end pivotally attached to one of said hanger members, a lever member pivotally mounted upon one face of the door, a pawl and segment associated with the lever for holding the same in adjusted position, and connecting elements between said door carried lever and the free ends of the roller carried levers.

3.' A sliding door raising and lowering means including a supporting track, comprising a pair of rollers adapted to ride upon said track, a casing :tor each roller of` inverted substantially Ueshaped formation, a depending bar having one end turned laterally and attachedto one side of each casing, said bar ipc/1,121

STEPHEN J. JACOBSMEIER. 

